#ifndef _SYSCALL_H
#define _SYSCALL_H

#include "util.h"

#define DECL_SYSCALL0(fn) int syscall_##fn();
#define DECL_SYSCALL1(fn,p1) int syscall_##fn(p1);
#define DECL_SYSCALL2(fn,p1,p2) int syscall_##fn(p1,p2);
#define DECL_SYSCALL3(fn,p1,p2,p3) int syscall_##fn(p1,p2,p3);
#define DECL_SYSCALL4(fn,p1,p2,p3,p4) int syscall_##fn(p1,p2,p3,p4);
#define DECL_SYSCALL5(fn,p1,p2,p3,p4,p5) int syscall_##fn(p1,p2,p3,p4,p5);

#define DEFN_SYSCALL0(fn, num) \
int syscall_##fn() \
{ \
 int a; \
 asm volatile("int $48" : "=a" (a) : "0" (num)); \
 return a; \
}

#define DEFN_SYSCALL1(fn, num, P1) \
int syscall_##fn(P1 p1) \
{ \
 int a; \
 asm volatile("int $48" : "=a" (a) : "0" (num), "b" ((int)p1)); \
 return a; \
}

#define DEFN_SYSCALL2(fn, num, P1, P2) \
int syscall_##fn(P1 p1, P2 p2) \
{ \
 int a; \
 asm volatile("int $48" : "=a" (a) : "0" (num), "b" ((int)p1), "c" ((int)p2)); \
 return a; \
}

#define DEFN_SYSCALL3(fn, num, P1, P2, P3) \
int syscall_##fn(P1 p1, P2 p2, P3 p3) \
{ \
 int a; \
 asm volatile("int $48" : "=a" (a) : "0" (num), "b" ((int)p1), "c" ((int)p2), "d" ((int)p3)); \
 return a; \
}

#define DEFN_SYSCALL4(fn, num, P1, P2, P3, P4) \
int syscall_##fn(P1 p1, P2 p2, P3 p3, P4 p4) \
{ \
 int a; \
 asm volatile("int $48" : "=a" (a) : "0" (num), "b" ((int)p1), "c" ((int)p2), "d" ((int)p3), "e" ((int)p4)); \
 return a; \
}

#define DEFN_SYSCALL5(fn, num, P1, P2, P3, P4, P5) \
int syscall_##fn(P1 p1, P2 p2, P3 p3, P4 p4, P5 p5) \
{ \
 int a; \
 asm volatile("int $48" : "=a" (a) : "0" (num), "b" ((int)p1), "c" ((int)p2), "d" ((int)p3), "e" ((int)p4), "f" ((int)p5)); \
 return a; \
}

void initialize_syscalls();

DECL_SYSCALL1(printf, const char*);
DECL_SYSCALL1(print_hex, int);
DECL_SYSCALL1(print_dec, int);
DECL_SYSCALL0(getch);
DECL_SYSCALL1(panic, const char*);
DECL_SYSCALL1(print_ch, char);
DECL_SYSCALL1(inportb, unsigned short);
DECL_SYSCALL2(outportb, unsigned short, unsigned char);

#endif

